/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/EdGraphSchema_Niagara.h
Resets a pin back to it's autogenerated default value, optionally calling the default value change callbacks
virtual void ResetPinToAutogeneratedDefaultValue ( [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * Pin, bool bCallModifyCallbacks ) const